Problems i there is power plant for a 100-m height and 4-m diameter stack whose exit gas has a velocity of 30 m/s. the wind velocity is 5 m/s with the stability class of c. the pressure is 1 atm, and the stack and surrounding temperatures are 100°c and 20°c (373k and 293k), respectively. estimate plume rise using briggs equation. when gravity acceleration g is 9.8 m/s2 problems ii in problem i, a power plant emits 200 g/s of so2. estimate the ground-level concentration of so2 from this source at a distance 2km directly downwind when the stability class is c problems iii for the same situation of problem ii, calculate ground- level concentration 250m to the side of the plume centerline. m problems iv 최까학지2. 지점 what is maximum ground level concentration and where is it located downstream in problem ii ?

The magnets are probably damaged or there not strong enough to attached to the refrigerator

    m₁v₁ + m₂v₂ = (m₁ + m₂)vmomentum is conserved.the left-hand side of the equation represents the momentum in the system before the collision.the right-hand side represents the momentum in the system after the collisionm₁ and v₁ represents the mass and the velocity of the physics blockm₂ and v₂ represents the mass and velocity of the ball of puttyv represents the final velocity of the combined mass.the question states the two masses stick together. they combined mass has its own velocity with the body mass the sum of the two objects' massestheir combined momentum is (m₁ + m₂)vto find the magitude of (m₁ + m₂)v, we need to add the vectors on the left-hand side of the equation: m₁v₁ + m₂v₂.note the diagram. i have positioned the vectors in accordance with their directions.the magnitude of the resultant can be calculated using the pythagorean theorem since this is a right triangle situation (north and west are perpendicular)|(m₁ + m₂)v| =  √[ (m₁v₁)² + (m₂v₂)² ]|(m₁ + m₂)v| =  √[ (1.5kg·8.0m/s)² + (0.40kg·20m/s)² ]|(m₁ + m₂)v| =  14.4 kg m/sfor two significant figures (assuming that 20m/s is two), this rounds to 14 kg m/s